public class LevelTwo {
    public static void main(String args[]) {
        int i=1;
        String str="不及格";
        switch (i)
        {
            case 1:
                i=1;
                str="不及格";
                break;
            case  2:
                i=2;
                str="及格";
                break;
            case  3:
                i=3;
                str="中等";
                break;
            case  4:
                i=4;
                str="良好";
                break;
            case  5:
                i=5;
                str="优秀";
                break;

        }
        System.out.println("成绩为"+str);
    }
}
